This is a 2011 Trek Equinox Women's Triathlon specific racing bike. It has an aluminum frame set, and has upgraded components to Sram Rival. Bike is a 47cm frame size which is the smallest in trek women's sizing. I am 5'0 and it would work for anyone 4'11-5'3 most likely. Bike had been ridden for racing and some training and has been incredibly well maintained. It has minor paint chipping from normal wear and tear, and has a Shimano pedal set included. Tri bar elbow pads need to be replaced but it is a cheap fix. Bike was just tuned up, has new bar tape, and is shifting smoothly. Feel free to call or text for questions! I am a retired team USA triathlete and am looking for a good home for her.